I measured from the floor to the top of the windshield frame, 44 1/2".
The highest part of the front of my cage, from the floor is 46"
Just make sure you have doors on, so you can get the correct width of the top of the cage, so your door window frames don't hit the cage. But that also depends on how your cage is designed. My front cage goes from the floor to the B pillar, with a spreader across the windshield.